32399780 has 48 divisors (see below), whose sum is σ = 79363200. Its totient is φ = 11106144.

The previous prime is 32399771. The next prime is 32399789. The reversal of 32399780 is 8799323.

It is an interprime number because it is at equal distance from previous prime (32399771) and next prime (32399789).

It is not an unprimeable number, because it can be changed into a prime (32399789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4499 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (1653400).

Almost surely, 2^32399780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 32399780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39681600).

32399780 is an abundant number, since it is smaller than the sum of its proper divisors (46963420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

32399780 is a wasteful number, since it uses less digits than its factorization.

32399780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4753 (or 4737 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 32399780 is about 5692.0804632401. The cubic root of 32399780 is about 318.7968491949.

The spelling of 32399780 in words is "thirty-two million, three hundred ninety-nine thousand, seven hundred eighty".